This is how to build on another artist's work. Unlike the producers of Glee, when Broken Record Films did a Beyoncé parody, they credited Beyoncé when they did so. Granted, Beyoncé has a slightly higher public profile than Jonathan Coulton, but the point still stands: If you are going to use another artist's work, the very least you can do is credit them.
As to the song itself, I agree with the singer a little bit. You can play too much Halo. But only because that would prevent you from playing more Skyrim. Or Skylanders.
Broken Record Films Musical Monday Home